Immoral Snakes appear in B5F and B6F of the Secret Laboratory within the Midnight Channel. They will attempt to inflict status ailments on the party or attack normally. Once defeated, they may drop the Venomous Fang material. Selling 6 Venomous Fangs will unlock the Poison Claw weapon for Teddie in the shop.

In Golden, it only appears in B6F. It may also drop Meteorite for trade at Shiroku Pub.